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template<typename T>
class SharedPtr {
T* value;
int* ref_count;
public:
SharedPtr(T* value) : value(value) {
ref_count = new int;
*ref_count = 1;
}
SharedPtr(const SharedPtr& other) {
value = other.value;
ref_count = other.ref_count;
(*ref_count)++;
}
SharedPtr(SharedPtr&& other) {
value = other.value;
ref_count = other.ref_count;
other.ref_count = nullptr;
}
~SharedPtr() {
if (ref_count == nullptr) {
return;
}
if (*ref_count == 1) {
delete value;
delete ref_count;
} else {
(*ref_count)--;
}
}
T& operator *() const {
return *value;
}
T* operator ->() const {
return value;
}
};
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